Yvonne is interested in testing the effectiveness of a new flea medication on dogs, so she divided some dogs with fleas into two groups, group A and group B. She gave group A the flea medication. Should she also give group B the flea medication?

A. No, because group A is already the control group
B. No, because group B should be the control group
C. Yes, because group B should be the control group
D. Yes, because group A is already the control group

Question

Yvonne is interested in testing the effectiveness of a new flea medication on dogs, so she divided some dogs with fleas into two groups, group A and group B. She gave group A the flea medication. Should she also give group B the flea medication?

 		A.	No, because group A is already the control group
 		B.	No, because group B should be the control group
 		C.	Yes, because group B should be the control group
 		D.	Yes, because group A is already the control group

phi · Answer

The idea is to divide the dogs into two groups:  1 group gets the meds, the other group does not.  Then at the end of the study, you compare which group did better.

If both groups get the med, you can't do that. So you don't want to give meds to both groups. That rules out some of your choices.

By the way, the group that does *not* get the meds is called the "control group"